Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1380
Object Name Mano
'Iipay Aa Name hapiichaa
Description A whole hand-held grinding stone, also known as a mano in Southern California archaeology. This bifacial stone is used with one hand for grinding and was shaped in construction; it is shouldered by usewear. It is square in shape. The stone material is a granitic, or perhaps a metamorphosed sandstone, with muscovite mica and a rusted area. It is medium grained.

This grinding or milling stone's ventral side is somewhat smooth with some pecking, about one-half of the stone is darkened and covers one perimeter edge. There is a rusted mineral weathering to the surface. Its dorsal side is somewhat smooth and pecked with a powdery white substance flaking off, perhaps a caliche (calcium carbonate). Striations appearing on the surface suggest that this mano was used in an undulating or back and forth movement. The perimeter sides and ends show a surface similar to the ventral and dorsal sides. The stone appears to be pecked on the surfaces; pecking increases the grinding surface for greater traction. The stone is also exfoliating and crumbly, and the pecking may be due to this quality.

Dimensions:
Length - 3.582", Width - 3.267", Depth - 1.535", Weight - 1.1 lbs.


Provenance This artifact was found within the local San Diego County region, collected 1910-1950.
Date Late Prehistoric (1300-800 YA)LP
Material Granitic
Culture Kumeyaay / DiegueƱo
Place of Origin San Diego County
Caption Mano, granitic: ventral view, side A (discoloration and weathering)